certainly some who equate mental health issues with sinning or lack of faith. Like, well, if you're experiencing this, you probably just need to have more faith and stop sinning. This ignores a lot of very real chemical/biological problems, and also a million very real social/"nurture" problems. I don't doubt that living a really good life and having faith in something (whatever your faith might be) are good and helpful things for mental health, but just b/c someone is dealing with brain issues doesn't mean that this is always the answer, or that they're faithless sinners at all.
This can play out in interesting ways too. Mostly that a lot of LDS people feel a stigma around mental issues -- if I'm depressed, and I let anyone know about it, they'll assume I'm a faithless sinner (b/c that's the only reason people are depressed), and so I don't want to let anyone know.
And that attitude, unfortunately, can get pushed hard in LDS communities (but got better once Holland talked about it really openly).